from vk_api import VkApi

TOKEN = ""

OWNER_ID = 0
POLL_ID = 0

vk = VkApi(TOKEN)

answers_ids = vk("polls.getById", owner_id=OWNER_ID, poll_id=POLL_ID)['answers']

poll_answers = vk("polls.getVoters", owner_id=OWNER_ID, poll_id=POLL_ID, answer_ids=",".join(answers_ids))

ansv_users = []

for ansv in poll_answers:
    ansv_users.extend(ansv['users']['items'])

# DO SOME WITH ansv_users